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A Look at Some Data on the Old Faithful Geyser

A. Azzalini and A. W. Bowman
Journal of the Royal Statistical Society. Series C (Applied Statistics)
Vol. 39, No. 3 (1990), pp. 357-365
Published by: Wiley for the Royal Statistical Society
DOI: 10.2307/2347385
Stable URL: http://www.jstor.org/stable/2347385
Page Count: 9
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A Look at Some Data on the Old Faithful Geyser
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Abstract

An analysis of data on the duration times and waiting times for eruptions from the Old Faithful Geyser reveals an interesting time series structure. A tentative physical model, derived from Rinehart, is outlined and a corresponding first-order Markov chain examined. It is shown that a second-order models is necessary to explain the observed correlations in the data. A curious clustering effect is apparent in the autocorrelation function when plotted over a large range of lags. Similar patterns are observed in simulations from the fitted second-order model.

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